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<head><meta charset="utf-8"><title>I-prioritize #78140 regression: array methods unstable feat… · t-compiler/wg-prioritization/alerts · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/index.html">t-compiler/wg-prioritization/alerts</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html">I-prioritize #78140 regression: array methods unstable feat…</a></h3>

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<a name="213921162"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213921162" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213921162">(Oct 20 2020 at 13:49)</a>:</h4>
<p><span class="user-group-mention" data-user-group-id="3111">@WG-prioritization/alerts</span> issue <a href="https://github.com/rust-lang/rust/issues/78140">#78140</a> has been requested for prioritization.</p>
<h1><a href="https://forge.rust-lang.org/compiler/prioritization/procedure.html#assign-priority-to-unprioritized-issues-with-i-prioritize-label">Procedure</a></h1>
<ul>
<li>Priority?</li>
<li>Regression?</li>
<li>Notify people/groups?</li>
<li>Needs <code>I-nominated</code>?</li>
</ul>



<a name="213927433"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213927433" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Stu <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213927433">(Oct 20 2020 at 14:31)</a>:</h4>
<p>Shouldn’t this be critical since it breaks stability guarantees?</p>



<a name="213938817"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213938817" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Mason Stallmo <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213938817">(Oct 20 2020 at 15:50)</a>:</h4>
<p><del>I'm on the fence here about if we should add a priority to this at all. It seems like the lang team discussed this already and settled on the fact that it's a bug fix and to let it ride </del></p>
<p><del>I'm not sure that the handful of crater failures would move the needle very far from the decision reached previously. I could be miss-reading this though.</del></p>
<p>Sorry wrong thread !</p>



<a name="213946380"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213946380" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> DPC <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213946380">(Oct 20 2020 at 16:45)</a>:</h4>
<p>it's an unstable feature though</p>



<a name="213965450"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213965450" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213965450">(Oct 20 2020 at 19:05)</a>:</h4>
<p>I feel a bit confused by the description -- it seems like it might be affecting stable code due to some kind of inference? Also, I don't think <span class="user-mention silent" data-user-id="116122">simulacrum</span> would have tagged with regression if it were unstable code. I'll ask in the issue.</p>



<a name="213966053"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213966053" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213966053">(Oct 20 2020 at 19:09)</a>:</h4>
<p>I just read it over again: this appears to be affecting <strong>beta-channel</strong> code, <em>not</em> nightly code. It seems like it's caused by type inference changing because of <code>as_slice*</code> being added.</p>



<a name="213966061"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/213966061" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Noah Lev <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#213966061">(Oct 20 2020 at 19:09)</a>:</h4>
<p>I think this should be <code>P-high</code></p>



<a name="214112219"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize%20%2378140%20regression%3A%20array%20methods%20unstable%20feat%E2%80%A6/near/214112219" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> triagebot <a href="https://rust-lang.github.io/zulip_archive/stream/245100-t-compiler/wg-prioritization/alerts/topic/I-prioritize.20.2378140.20regression.3A.20array.20methods.20unstable.20feat.E2.80.A6.html#214112219">(Oct 21 2020 at 20:43)</a>:</h4>
<p>Issue <a href="https://github.com/rust-lang/rust/issues/78140">#78140</a>'s prioritization request has been removed.</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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